A design method of alternative throat nozzles(ATN)is proposed,which shares 70%~90% supersonic wall contour,and changes the throat to generate different Mach number flows with uniform outflows.Generally,different throats correspond with different wave-cancellation wall contours,or else the outflow of the nozzle will distort.Here,we propose an inverse design method to ensure different throats share the same wave-cancellation wall contour without any flow distortion.Numerical simulation indicates that the deviation of the Ma in the nozzle diamond zone can be restricted within 0.5%.Additionally,the cost of the nozzles used in supersonic and hypersonic wind tunnels can be reduced above 50%.